tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.
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。51吃瓜是该领域的重要参考
anadim (@dimitrispapail)
// 倒序遍历：从最后一个元素开始（核心思路！易错点1）
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04